diff --git a/README.md b/README.md
index 02406535..6f8fcfc8 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 [![R-CMD-check](https://github.com/MRCIEU/TwoSampleMR/actions/workflows/check-full.yaml/badge.svg)](https://github.com/MRCIEU/TwoSampleMR/actions/workflows/check-full.yaml)
 [![Lifecycle:
 experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html)
-[![DOI](https://zenodo.org/badge/49515156.svg)](https://zenodo.org/badge/latestdoi/49515156)
+[![DOI](https://img.shields.io/badge/DOI-10.5281%2Fzenodo.3298000-blue.svg)](https://doi.org/10.5281/zenodo.3298000)
 [![Codecov test
 coverage](https://codecov.io/gh/MRCIEU/TwoSampleMR/branch/master/graph/badge.svg)](https://app.codecov.io/gh/MRCIEU/TwoSampleMR?branch=master)
 [![TwoSampleMR status
@@ -16,9 +16,8 @@ badge](https://mrcieu.r-universe.dev/badges/TwoSampleMR)](https://mrcieu.r-unive
 <!-- badges: end -->
 
 A package for performing Mendelian randomization using GWAS summary
-data. It uses the [IEU OpenGWAS database](https://opengwas.io) to
-obtain data automatically, and a wide range of methods to run the
-analysis.
+data. It uses the [IEU OpenGWAS database](https://opengwas.io) to obtain
+data automatically, and a wide range of methods to run the analysis.
 
 ## January 2020 major update
 
diff --git a/index.md b/index.md
index 85c4fef8..4ceb7bc2 100644
--- a/index.md
+++ b/index.md
@@ -2,7 +2,7 @@
 
 <!-- badges: start -->
 [![R-CMD-check](https://github.com/MRCIEU/TwoSampleMR/actions/workflows/check-full.yaml/badge.svg)](https://github.com/MRCIEU/TwoSampleMR/actions/workflows/check-full.yaml)
-[![Lifecycle: experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html) [![DOI](https://zenodo.org/badge/49515156.svg)](https://zenodo.org/badge/latestdoi/49515156)
+[![Lifecycle: experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html) [![DOI](https://img.shields.io/badge/DOI-10.5281%2Fzenodo.3298000-blue.svg)](https://doi.org/10.5281/zenodo.3298000)
 [![Codecov test coverage](https://codecov.io/gh/MRCIEU/TwoSampleMR/branch/master/graph/badge.svg)](https://app.codecov.io/gh/MRCIEU/TwoSampleMR?branch=master)
 [![TwoSampleMR status badge](https://mrcieu.r-universe.dev/badges/TwoSampleMR)](https://mrcieu.r-universe.dev/TwoSampleMR)
 <!-- badges: end -->